Intermittent auth success

[danielst]

Over the last few days I've been recieving oauth error messages when trying to authenticate with a users access token. I'm using a node.js app to connect. The message I recieve is as below (I've obfuscated the tokens).

Invalid signature or token 'xxxx' or token 'xxxx'

[ibahdanau]

Hello, the only possible reason for message 

[Invalid signature or token 'xxxx' or token 'xxxx']

can be either invalid signature or invalid token. Please check your signature or token that you're using.

[danielst]

Yes, I understand the error message, the problem is that the same set of credentials will sometimes work, and sometimes not. I've even used your API debugging tool with the same results.

[ibahdanau]

Please check endpoints you're using. Some api endpoints do not require user's token.

This is the only reason I can see that it sometimes work and sometimes is not.

Try to figure out what are conditions  when credentials work and when they don't

[litzastark]

I'm not sure if you've already solved this problem, but I've also been experiencing it. For the record, it was happening because of non-urlencoded characters in my generated oauth_signature parameter. Occasionally a signature would be generated with only alphanumeric characters, and these would succeed; the rest would not. Properly encoding the signature solved the problem!